Water Maser Emission from the Active Nucleus in M51
作者： Yoshiaki Hagiwara , Christian Henkel , Karl M. Menten , Naomasa Nakai
DOI: 10.1086/324171
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摘要: At 22 GHz, water vapor "kilomaser" emission is reported from the central region of Whirlpool galaxy M51 (NGC 5194). The redshifted spectral features (VLSR ~ 560 km s-1), flaring during most year 2000, originate a spatially unresolved maser spot size 30 mas (1.5 pc), displaced by 250 nucleus. data provide first direct evidence for association an H2O kilomaser with active galactic In early 2001, blueshifted 435 s-1) was also detected. Red- and bracket systemic velocity asymmetrically. Within standard model rotating Keplerian torus, this may suggest presence either highly eccentric circumnuclear cloud or red- "high-velocity" radially extended torus. Most consistent measured position, however, northern part bipolar radio jet. scenario, (weaker) jet receding while associated approaching southern
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Carl J. Grillmair, S. M. Faber, Tod R. Lauer, J. Jeff Hester, C. Roger Lynds, Earl J. O'Neil, Jr., Paul A. Scowen, Erratum: “The Nuclear Region of M51 Imaged with the HST Planetary Camera” [Astron. J. 113, 225 (1997)] The Astronomical Journal. ,vol. 116, pp. 547- 547 ,(1998) , 10.1086/300391
P. Diamond, A. Riess, J. Herrnstein, J. Herrnstein, M. Inoue, James M. Moran, Lincoln Jared Greenhill, N. Nakai, C. Henkel, M. Miyoshi, A geometric distance to the galaxy NGC4258 from orbital motions in a nuclear gas disk Nature. ,vol. 400, pp. 539- 541 ,(1999) , 10.1038/22972
P. C. Crane, J. M. van der Hulst, THE RADIO JET IN M51 The Astronomical Journal. ,vol. 103, pp. 1146- 1150 ,(1992) , 10.1086/116132
Naomasa Nakai, Philip J. Diamond, Ryohei Kawabe, Yoshiaki Hagiwara, VLBI study of water maser emission in the Seyfert 2 galaxy NGC5793. I: Imaging blueshifted emission and the parsec-scale jet arXiv: Astrophysics. ,(2001) , 10.1086/322416
Y. Terashima, A. Ptak, R. Fujimoto, M. Itoh, H. Kunieda, K. Makishima, P. J. Serlemitsos, An ASCA Observation of M51 (NGC 5194): Iron K Emission from an Obscured Active Galactic Nucleus The Astrophysical Journal. ,vol. 496, pp. 210- 215 ,(1998) , 10.1086/305367
Jean L. Turner, Paul T. P. Ho, Bright radio continuum emission from star formation in the cores of nearby spiral galaxies The Astrophysical Journal. ,vol. 421, pp. 122- 139 ,(1994) , 10.1086/173631
J. F. Gallimore, C. Henkel, S. A. Baum, I. S. Glass, M. J. Claussen, M. A. Prieto, A. Von Kap‐herr, The Nature of the Nuclear H2O Masers of NGC 1068: Reverberation and Evidence for a Rotating Disk Geometry The Astrophysical Journal. ,vol. 556, pp. 694- 715 ,(2001) , 10.1086/321616
M. J. Claussen, P. J. Diamond, J. A. Braatz, A. S. Wilson, C. Henkel, The Water Masers in the Elliptical Galaxy NGC 1052 The Astrophysical Journal. ,vol. 500, ,(1998) , 10.1086/311405
C. Ma, E. F. Arias, T. M. Eubanks, A. L. Fey, A.-M. Gontier, C. S. Jacobs, O. J. Sovers, B. A. Archinal, P. Charlot, The International Celestial Reference Frame as Realized by Very Long Baseline Interferometry The Astronomical Journal. ,vol. 116, pp. 516- 546 ,(1998) , 10.1086/300408
L. J. Greenhill, J. M. Moran, M. J. Reid, C. R. Gwinn, K. M. Menten, A. Eckart, H. Hirabayashi, First images of water vapor masers in the galaxy M33 The Astrophysical Journal. ,vol. 364, pp. 513- 526 ,(1990) , 10.1086/169433